Tile.



P. M. STEWART.

TILE.

APPLIGATION FILED SEPT. 1o, 1912.

1,073,541. Pqtented Sept. 16, 1913.

UNIE

stra? rar fr ormoni..

' TILE.

To all whom it may concern Be it known that I, Perez M. SrEWAn'r, a citizen ofthe United States., and f1 IGS- dent of the' borough .of Manhattan, city, county, and State of New York, have invented an Improvement inTles, 0f which the following description, in connection with the accompanying drawings, is aspecifioation, like letters on the drawings representing like parts.

This invention relates to a roofin tile and has for its ob'ect to rovde an el cient, inexpensive, an durab e tile, which is capable of resisting the weather and reduces to a minimum condensation of moisture on `its inner side. To this end, the tile is composed of a body portion or slab of concrete, having a metal reinforcement Within it, and provided on the surface which isto be exposed to the weather, with a layer of fibrous mineral fabric, which is capable of having applied to it a layer or coating of paint or other' waterproofing material.

The layer of fibrous mineral fabric is preferably composed of asbestos paper, which is bonded with the concrete in a manner as will be described.

The roofing tile may be flat or corrugated, and when` corrugated, the valleys of the corrugations may and preferably will be provided with means for protecting the edges of Ithe side walls of the valleys from being chipped or broken off in handling the tile, both in transportation and on the job.

The particular features of this invention will be pointed out in the claim at the end of this specification.

Figure 1 is a perspective view of a roofing tile embodying this invention, with part of the fibrous layer broken away. Fig. -2, a section on the line 2 2, Fig. 1. Fig. 3, a section of a mold and of the tile formed therein.

In the present instance, I have shown the invention as embodied in aV roofing tile, comprising a concrete body portion or slab a` provided with corrugations, which form raised projections or ribs b on one surface and valleys or depressions c on the opposite surface, a metal reinforcement.' d within it, a layer 14 of asbestos fabric, which isbonded to the outer surface of the tile'and is rendered waterproof in any suitable ordesired manner as by a coating of oil ory aint f'.

In Fig. 3, I have illustrated one orm of Bp eoifcation ot Letters Intent.

Application lpd September 10, 1912. Serial No. 719,604.

apparatus with which the corrugated tile shown in Fig. 1 may be made. The apparatus comprises a box l() of wood, or other suitable material, which is open at its top and contains within it a metal plate 12, which is provided with corrugations 13. The metal plate 12 forms the bottom of the mold and has laid upon it a sheet 14 of fibrous mineral fabric, such as asbestos paper. The concrete in a plastic state is then poured or placed into the mold 10, and the latter is filled with concrete to the pro er height to form' the concrete slab or bo y portion a of the proper or desired thickness. The slab or body a of concrete may and preferably will-be strengthened by a metal reinforcement, preferably a plurality of metal rods d which may be suitably supported in the mold above the bottom thereof, before the concrete is placed in the mold; or they may be laid on the concrete after a sufficient thickness of concrete has been placed in the mold. The corrugations in the bottom plate 12 of the mold form the projections or ribs b on the concrete slab or body portion, and corresponding valleys c may be formed in the opposite surface of the said slab by a suitable form, which may be a metal trough 18 of the proper width to receive in it a rib orprojeotion Z) on another slab, so that two adjacent slabs may overlap when in use. The metal trough 18 may and preferably will be provided with side flanges 19, which are embedded in the concrete substantially flush with the surface 20 thereof. The flanged trough 18 serves as a protector for the edges of the side Walls of the valleys formed in the concrete, and prevents said edges from being chipped or broken oil' when handled, both in transportation and on the job. The concrete tile thus formed is allowed to stay in the mold until the concrete has set, when it is removed. By reason of the fact that the concrete is plastic or wet when placed in the mold, a firm and close union or bond is effected between the con`- crete body and the fibrous mineral sheet or layer 14 by the intermingling of the fibers of the mineral sheet with the concrete, so that when the concrete tile is removed from the mold, the sheet or layer 14 of fibrous mineral fabric is removed with it and forms part thereof. The concrete tile is inverted when used, so that, the fibrous mineral sheetor layer 14 forms the outer or upper surface Patented Sept. 16, 1913'.`

, face is kept free or substantially free fromof the tile,as represented in Fig. 1, and this librous sheet is capable of belng rendered waterproof by applying a4 coat f of paintthereto, or inany other suitable manner, with the result, that a superior roofingtile is obtained whose surface exposed to the Weather is Waterproof,` and whose under sur- Water of condensation by the fibrous mineral layer or sheet 14, as the latter not only protects the concrete body against the weather, but also serves as an insulator of heat to prevent or reduce condensation on the under or inner surface of the tile.

ln Fig. 2, the tile is represented in the position it occupies in the mold, whereas in' Fig. l it is shown inverted and in its operative position..

llt is Hpreferred to make the tile corrugated as herein shown, but it is not desired to limit nominal the vinventitm-Li.n made dat. y

The tile herein shown is especially applicable for the inclined roofs of power houses, foundries, chemical plants and like buildings.

this respectas .it may be llt is inexpensive,'durable, waterproof .and agood insulator of heat. l 

